Manufacture of composition roofing-sheets.



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To all whom it may concern Be itknown that we JnMns C. Woooma, a citizen of the -United States, residing in Evanston, Illinois, and RAY' P...Pnnnr,

a citizen of the United 5 States, residing in Montclair, New Jersey, have invented certain new and useful Improvements in the Manufacture of Composition Roofin Sheets, of which the following is a specication.

Gur invention aims to provide certain improvements in the manufacture of sheets for roofing and similarpurposes from plastic bituminous compositions suchas that described in the patent of James C. VVoodley, No. 1,156,122, October 12th, 1915. This composition includes a bituminous mass with a. quantityof fibers separately coated and distributedthroughout the binder.

The plastic composition is rolled into sheets ordinarily about thirty-two inches wide and one-quarter 0% an inch or less in thickness, after which the sheets are wound into rolls of convenient size for handling and transportation. The rolling of the sheets compacts them in the direction of their thickness but extends their width so that when the rolls stand on end, with the weight thereof operating in the direction of the Width of the sheets, there is a tendency to settling, thus reducing the widths of the sheets. The customers may thus find the sheets-narrower than intended, or one sheet narrower than another, or even the same sheet narrower at some points than at others. The longer such a roll stands on end and the hotter the atmosphere to which it is exposed, the greater the settling, eventually reaching a-maximum point at which it substantially ceases.

According to our invention the coils or rolls of roofing sheets thus made are sub jected to pressure in line with the axis of the rolls, that is in the direction of the width of the sheet. The amount of compression which the rolls will take under these circumstances depends somewhat on the temperature. When stored in a warm room the rolls of roofing-as ordinarily made and inclosed n'ipressed in a paper wrapper may be cc' about two inches for a width oii th1rty-two' inches. This endwise compression of the rolls serves to give an increased density to Patented Nov. 14, 1916..

reispilcation filed December-3, 1915. Serial No. 65,667.

the sheets in the direction of their width,

iii

may be super-compressed; that is, c

pressed to an extent greater thaw the maximum which they would undergo naturally.

The material is elastic and expands somewhat when the pressure is removed.

to secure a determined ultimate widt sheet we may compress it to a less'width so.

usv of.

that when it expands it will'have the determined width; the extent of super-compression and of reexpanslonbeing determinable within reasonable limits by experiment .on

difierent grades of sheets. By this compression in the factory substantial uniformity in width of each sheet from end to end and'in' the diiferent sheets is insured, as well as the securing of a desired width in the sheet when it comes to be used.

be eliected in a variety of ways. Pressure The compacting of the composition may may be applied at either end or at both ends! A short application of way will serve to edect practically the same highpressu-r'e in this compression which would occur by ,1 the weight of the material itself in rolls stti iding on end for a lon the rolls may be enve oped in a casing an a pressure applied by means of flat plates-at one or both ends operated by pneumatic, I

hydraulic, screw or other power, the sure bein applied radually and the cad. being varied under the rolls might be allowed to stand for a sufficient length of time to settle bythei r own weight, pressure being applied arti ficially afterward to distribute evenlythe reduction in width so as to secure a sheet of uniiorm and determined width.

The sheets are made insome cases with an embossed" surface. The result is that in the resiflerent conditions. Or

roll there are greater air spaces between adl v joining turns in the sheet than where the air spaces in the roll the greater the possi- 1- which I v 4 erzzbiyefihfi 20115 are confineai m a tight Wrap shmiu "Jake h zsimhg slmbia.

er. This may be strip of wavy papal" 0:

other fabric whisk is Wound, with tim ghee-i 0f compasition armmd the 'usual ceiltml 00m v. and which has its Ouizer 3m} fasteneai down pressure during in any suitable Way; or it may he a wrapper 'tempm'ary'casing such as metal. jacket may be user only (wring the perrioiof endwxse a mmesswn; Inmther case 1%; 1s 1mamund its com, as by exerting a. continuum noint where the sheet is bang am to m 2 01 This-retimzes w a minimum any @212 spa. between the successive ssnvclufifmss and m COI'PsQSPQEldiIlP? extent restricts he frseem of the material 1341- expand mfiiafi and via cuntract longiudilmlly.

Wham We claim it? l. in the manufiacture 0f sheets 91 .1" ing or the like of plasfiic-mamrial 531x22 mevim which consifits in fanning the nizat'arimi a1 sheet by wmpresaion an file ciirenimi m its thickness wmpressing Skew, fihe oiirecfisinn. 01 its wkriih whim canimin" in *oh'e directiw of isthicimess.

2 In the manufaciu'z'e 9f 5 ing or the like-0f plastic which consisits in forming the m afihah by cempmssion in its thickness, and 'inczvea sing 12.; out substantial difiortbn by sum; the dimction 0' 3. Ix; 'ihfi ing 01 the'Eik-e bituminous me: directiei (:45 iizs shew; intn 2'03 wmpres fins with its axis.

In the manufacium @f sheets 02? waiing or thelike 0:? plastic mmfiexiz zl men w'iiish mmsisfss in forming the ma az'ia'i inn;

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